The NOx System in Homogeneous and Heterogeneous Nuclear Waste

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Description

This project focuses on the development of reliable theoretical and efficient computational descriptions of the chemistry of high-level waste simulants in highly concentrated solution and the experimental validation of this approach. It is an extension of previous work which: (a) Determined the mechanism of H{sub 2} formation in waste simulants allowing quantitative prediction of H{sub 2} generation in nuclear waste storage tanks; (b) Predicted and confirmed NO{sub 2} as a key oxidant in the tanks (c) Determined relative rates of reaction of NO{sub 2} with chelators thus helping to resolve the ''Organic Tanks'' safety issue; (d) Measured rates of NO{sub ... continued below

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4 pages

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Meisel, Dan; Bentley, Dan; Camaioni, Donald M. & Shaw, Wendy S. June 1, 2001.

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Description

This project focuses on the development of reliable theoretical and efficient computational descriptions of the chemistry of high-level waste simulants in highly concentrated solution and the experimental validation of this approach. It is an extension of previous work which: (a) Determined the mechanism of H{sub 2} formation in waste simulants allowing quantitative prediction of H{sub 2} generation in nuclear waste storage tanks; (b) Predicted and confirmed NO{sub 2} as a key oxidant in the tanks (c) Determined relative rates of reaction of NO{sub 2} with chelators thus helping to resolve the ''Organic Tanks'' safety issue; (d) Measured rates of NO{sub 2} and NO{sub 2}{sup -} with some model organic radicals; (e) Quantified the redox potentials of two major reductants, NO{sub 2}{sup -} and NO{sub 3}{sup -}; (f) Discovered a new radiolytic route to the reductant NO{sub 3}{sup 2-} and demonstrated its potential persistence in irradiated alkaline aqueous media; (g) Demonstrated that while radiolytic electrons escape from solid suspended silica particles to disrupt the surroundings, holes remain trapped thus storing oxidative equivalents.

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4 pages

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  • Other Information: PBD: 1 Jun 2001

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • June 1, 2001

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 21, 2016, 3:18 p.m.

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Meisel, Dan; Bentley, Dan; Camaioni, Donald M. & Shaw, Wendy S. The NOx System in Homogeneous and Heterogeneous Nuclear Waste, report, June 1, 2001; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc783251/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.